21289120

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:230

約数の個数: 96

約数和(自身を含む): 54432000

約数和(自身を除く): 33142880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 47, 76, 80, 94, 95, 149, 152, 160, 188, 190, 235, 298, 304, 376, 380, 470, 596, 608, 745, 752, 760, 893, 940, 1192, 1490, 1504, 1520, 1786, 1880, 2384, 2831, 2980, 3040, 3572, 3760, 4465, 4768, 5662, 5960, 7003, 7144, 7520, 8930, 11324, 11920, 14006, 14155, 14288, 17860, 22648, 23840, 28012, 28310, 28576, 35015, 35720, 45296, 56024, 56620, 70030, 71440, 90592, 112048, 113240, 133057, 140060, 142880, 224096, 226480, 266114, 280120, 452960, 532228, 560240, 665285, 1064456, 1120480, 1330570, 2128912, 2661140, 4257824, 5322280, 10644560, 21289120]

約数ペア:

[(1, 21289120), (2, 10644560), (4, 5322280), (5, 4257824), (8, 2661140), (10, 2128912), (16, 1330570), (19, 1120480), (20, 1064456), (32, 665285), (38, 560240), (40, 532228), (47, 452960), (76, 280120), (80, 266114), (94, 226480), (95, 224096), (149, 142880), (152, 140060), (160, 133057), (188, 113240), (190, 112048), (235, 90592), (298, 71440), (304, 70030), (376, 56620), (380, 56024), (470, 45296), (596, 35720), (608, 35015), (745, 28576), (752, 28310), (760, 28012), (893, 23840), (940, 22648), (1192, 17860), (1490, 14288), (1504, 14155), (1520, 14006), (1786, 11920), (1880, 11324), (2384, 8930), (2831, 7520), (2980, 7144), (3040, 7003), (3572, 5960), (3760, 5662), (4465, 4768)]